HAGERSTOWN (Maryland): Family members of an American development expert kidnapped in Pakistan by Al Qaeda more than two years ago said on Thursday a recently released video and letter haven`t convinced them he`s alive.

Warren Weinstein`s wife, two daughters, son-in-law and grandchildren released a statement asking for `datespecific` confirmation that the 72-year-old is alive and well.

`We are extremely concerned about his health and implore his captors to attend to his medical needs. More importantly, we ask that they find it in their hearts to release him immediately so he may return home to us for the additional urgent care he needs,` the family statement read.

Weinstein appeared in a video sent last week to reporters in Pakistan, appealing to President Barack Obama to negotiate his release. It was the first video to show Weinstein since September 2012. There was no indication of when it was made. An accompanying, handwritten note was dated Oct 3. The family statement didn`t specify Weinstein`s medical needs.-AP